Question

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scientists who study elements and how they interact are called chemists. which of the following would a chemist most likely study?
the evidence of changes in the climate of the ancient earth
the structure and properties of elements like oxygen and iron
the behavior of microscopic organisms in a pond
the formation of stars and galaxies

Explanation:

Chemists study elements and their properties. The structure and properties of elements like oxygen and iron fall within the scope of chemistry. The evidence of climate - change in ancient Earth is more related to geology or paleoclimatology, the behavior of microorganisms in a pond is more of a biology topic, and the formation of stars and galaxies is an astronomy topic.

Answer:

The structure and properties of elements like oxygen and iron